Vulnerability Details : CVE-2018-16150
In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification does not reject excess data after the hash value. Consequently, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation through fake X.509 certificates. This is a variant of CVE-2006-4340.
Products affected by CVE-2018-16150
- cpe:2.3:a:axtls_project:axtls:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-16150
0.15%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-16150
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
5.9
|
MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
2.2
|
3.6
|
NIST |
CWE ids for CVE-2018-16150
-
The product does not verify, or incorrectly verifies, the cryptographic signature for data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-16150
-
https://sourceforge.net/p/axtls/mailman/message/36459928/
axTLS Embedded SSL / Re: [axtls-general] Problems of PKCS#1 v1.5 RSA Signature VerificationThird Party Advisory
-
https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c
Apply CVE fixes for X509 parsing · igrr/axtls-8266@5efe294 · GitHubPatch;Third Party Advisory
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